A bag contains total 20 balls in which x are yellow balls x 4 are green balls and y are red balls If...........

Quantitative Aptitude(IBPS CL) Probability

A bag contains total 20 balls in which x are yellow balls, (x + 4) are green balls and y are red balls. If the probability of picking 1 red ball is 1/5 , find the number of green balls in the bag.

छोटे Courses बड़े Results

Master Probability

Prepare through Micro-courses

Try Now

Explanation:

The probability of picking 1 Red ball =1/5
So, y/20=1/5
⇒ y = 4
Total number of Yellow and Green balls = 20 – 4 = 16
x + x + 4 = 16
⇒ 2x = 12
⇒ x = 6
Number of Red balls in the bag = 6 + 4 = 10